Why website not alerted nor blocked?

See: http://urlquery.net/report.php?id=1429969991395
Fortinet’s web filter gives as malware.
See VT results: https://www.virustotal.com/nl/domain/www.collserve.com/information/
Sucuri does not have it.
Code empty:

<HTML><HEAD></HEAD><BODY></BODY></HTML>

Re: http://ddecode.com/hexdecoder/?results=c0081ea0524347e55ba860cdec941373
for htxp://www.collserve.com/JavascriptInsert.js

pol